悔之不及

Explanation: Sorry too late. 　　Usage: The main predicate; as the predicate attribute, object; containing derogatory 　　Source: Yuan Anonymous "three Xiao Pei" First off: "a wish that day, all three brothers lost in Xuzhou, the less regret." 　　Examples: _Set_ down or delayed, is get people to go to, is it ~. (Qing Li Baojia "Bureaucrats" thirty-fifth back) Thesaurus:  spare no pains, Not report labor, zealously and earnestly, work hard and not be upset by criticism; willingly bear the burden of office, bear the burden and heat of the day, Remorse, to regret a previous mistake, It will be too late to regret (often used in warning or dissuading somebody, Huizhiwuji, Afterthought Mo and, Office workers of any blame, be full of remorse